1.)
microestructure of a 1018 steel. water quenched. nital 2% etch during 5 seconds, 100X.
2.)
A)
microestructure of a 1018 steel. oil quenched. using nital 5% etch during 5 seconds, 100X.
B)
microestructure of a 1018 steel. oil quenched. using nital 5% etch during 5 seconds, 10X...
